Snap gauge



July 24, 1951 J, E 2,562,124

SNAP GAUGE Filed Feb. 26, 1945 28 i 32 j v 3 g 4 INVENTOR.

20 By dfiN/PEEF ReefjDetroit Th s ven ec. has? telgmiiin c 2. lanc of t e t com ris s a .u aan. ere ovi ed with-caress tiv l adjus able toward and a ay. other-and. be ween whi h. a? ease. th dimens on of sa d. n ivid d in o twcsect e-as dis osed a relations p for inde endent slides with na guide way formed im act-end frame. one iaw-..sec t isnormallyinrciecte o app a h nearer .togthewoppcsedjaw than the other jawsection whereby-a .par stc he ease y be received betweenlsaid other .jawisecticn: and. theopposed jaw but such part to be gaged will not enter the space between the opposed jaw and said projec'tedijaw s'ectionr ,eaphiect s to rrwide a ate ter described wherein novel mean-s prqyided to advance or withdraw adi-ustableiiaw Within a guide. A further object is to provide'a gage having adjustable jaws and means-operable to adjust and maintain the jaws atadjust'e d position which adjustable-jaws and means are-so as to 'be protected against being accidentallystruek anditherebypossiblydisplacedm' U "Another object is to provide a gage of thec har actcr set forth which is of simple, sturdy-con}- struction andwhereinthe-gaging jaws; maybe readily adjusted and'will n aimaintheir adjustment throughout long periods oi use.

I, Other objects, advantagesand nieritorio" ff" hires will more fully appear fr'cin' the following description, appended claims and accompanying drawing, wherein:

Figure 1 is a plan of a gage embodying the invention.

Figure 2 is a cross sectional view taken on the line 2-2 of Figure 1.

Figure 3 is a cross sectional view taken on line 3-3 of Figure 2.

Figure 4 is a cross sectional view taken on the line 4-4 of Figure 3.

Figure 5 is a perspective of one of the jaw sections.

Figure 6 is a cross sectional view taken on the line 6-6 of Figure 1.

The gage illustrated in the drawing comprises a U-shaped body or frame In. Each end of the frame is provided with a guide way l2. Within the guide way at one end of the frame is mounted a jaw l4. Within the guide way of the other end of the frame a pair of jaw sections it and I8 lpgiitsiioiiaem a, 1945;.seria1 No. 579.807- r i ar siicabiylmiiriiee for hide-p rcent adjustment toward, and .away. from the jaw l4. Normally, the aw. section i8 is projected closer to the ion-s posed jaw l4 than is the jaw section, 161.. This;

; ifilshowniin Figures. 1 and Due -to this. ar-

rangementa part to be gagedwhich is :ofaaa'size; to. just .be. received between. the. 'j aw- 'sectiont. l6: and the opposed=jaw l4 WiIlnQt'enter-s through. the space between the jaw section: 18 "andythe jaw 14. The gage therefore constitutes what was above referred to as a go no go gage.

.wln the gage here shown each of the jaw ele.-.' ments is capable of adjustment toward and away from;-the'opposed jaw element. Each adjustables jaw-element carries a screw 20 which .is threaded; thereinto; as shown in Figure Grand which screw extends through a slot 22 formed in 'the end'ofi the. frame .as shown in Figures 1 and 3.. This :slot is undercut as at 24" sothat the head of the: screw may be tightened down against such undersi cut. portion and draw the jaw securely against:

the. bottom-ofthe guide. way 22 as shown in Figure-ate provide for'holding the adjustablejawelements lat adjusted positions with respect.

2. toeach other. i

Each guide way underneath an adjustablejaw is provided twith a recess 26. screw28wis threaded into'a' threaded aperture the bottom of this recess. "Thescr'ew. extends lengthwisev of the recess'which recess extends lengthwise of; the direction of permitted adjust ment of the jaw; Each adjustable jaw is'provided with-a cutout or groove 30 formed inits under surface" as shown'in Figure 5; -The head 32- of the adjustmentscrew 28 is revolvablyreceivedwithin.- the :groove 30 I so that when the screw is threaded in or out with respect to the recess 26 the jaw is advanced or withdrawn with the screw.

A cover plate 34 is secured by screws 36 to the outer face of each end of the frame .as shown particularly in Figure 3 to overlie the ends of the jaws and the ends of the adjustment screws so that they are protected against displacement due to being accidentally struck while the gage is in use in a, shop.

Upon removal of the cover plate 34 access is obtained to screws 28 to rotate them. Each jaw is normally held by its screws 20 against the bottom of its guide way but upon loosening its screws 20 a jaw may be advanced or withdrawn with respect to the opposed jaw member through rotation of its adjustment screws 28. When the proper adjustment has been made the cover plate 34 is replaced and fastened down by the screws 36. It

An adj ustme'nt' is apparent that in the construction shown any one of the three jaw elements may be advanced or withdrawn with respect to the opposed jaw elements.

Each of the three jaws [4, I6 and I8 is shown in Figures 2, 4 and 6 as provided with a shoulder l extending along its gauging edge portion which shoulder projects beyond that face of the frame within which the jaws are slidably disposed, when such jaws are received within the channel recess of a piece of work with the outer faces of the jaws opposed to one side wall of the channel the shoulders [5 of the jaws alone engage a side wall of the channel, thereby minimizing the friction and reducing danger of error due to irregularity of the surface of the work. Such part to be gauged might constitute a portion of a structure which was of a size that would prevent entrance of the part between the arms of the frame, but because of the projection of the shoulders beyond the plane of the arms, the part to be gauged could be entered between the shoulder portions of the jaws even though the structure would not enter between the arms.

The gauging edge portions of the jaws might exhibit any desired contour, as for example any desired radius or bevel to be received within any shape of groove of part to be gauged.

What I claim is:

1. A gage comprising a U-shaped frame, aligned channel guide ways transversely disposed in the side faces of the outer ends of the arms, eacharm having a bore extending transversely therethrough parallel to said guide way and in superposed relation thereto, each bore being counterbored from the outer side of said arm throughout a portion of its length, the radius of the counterbore being greater than the distance from the center of said bore to the bearing surface of the bottom of said guide way whereby the counterbore throughout its length communicates with the bottom of the guide way and forms a slot therein, said bore being internally threaded along the remainder of its length, an adjusting screw received within the threaded portion of each bore having a head conforming to the size of the counterbore and received therein whereby said head projects through said slot into the bottom of said guide way, a jaw slidably mounted in each guide way, and means for retaining the same therein, each jaw having a transversely disposed groove adjacent one end receiving the head of the adjacent screw whereby rotation of the same moves the jaw along the guide way, each jaw retaining means comprising a slot in the frame arm ex-.

tending in the direction of jaw movement and communicating with the bottom of the guide way, and a headed screw extending through said slot and threaded into an opening in the jaw.

2. A gage comprising a U -shaped frame, aligned channel guide ways transversely disposed in the side faces of the outer ends of the arms, each arm having a bore extending transversely therethrough parallel to said guide way and in superposed relation, thereto,,each bore ibeing counterbored from the outer side: of said arm throughout a portion of its length, the radius of the counterbore being greater than the distance from the center of said bore to the bearing surface of the bottom of said guide way whereby the counter- ;bore throughout its length communicates with the bottom of the guide way and forms a slot therein, said bore' being internally threaded along the remainder of its length, an adjusting screw received within the threaded portion of each bore having a head conforming to the size of the counterbore-and receivedtherein whereby said head projects through said slot into the bottom of said guide way,-a-jaw slidably mounted in each guide way, and means for-retaiinng the same therein, each 'jaw' having a transversely disposed groove adjacent one (and receiving the head of the adjacent screw whereby-rotation of the same moves the jaw along the guide way, each jaw retaining means comprising a slot in the frame arm extending in thedirection'of jaw movement and com-- municating with the bottom-of the guide way, and a headedscrew extending through said slot and threaded into an'opening-in the jaw, said slot being undercut on the side opposite the jaw for reception of the head of'the screw to a depth'substantiallyequal 'to the thickness thereof.

1 13 JAN REEF.

' REFERENCES orrEn The following-references are of record in the file of thispatent:

' UNITED s'rA'rEs PATENTS Number. Name Date 1,289,089 Begle Dec. 31, 1918. 1,436,260 Jackson Nov. 21, 1922. 1,473,351, I Ludin Nov. 6, 1923 1,489,577 Hanson Apr. 8, 1924, 1,571,314 Blood Feb. 2, 1926 1,574,735- Paloski Feb. 23, 1926. 2,265,234 Jensen Dec. 9, 1941 FOREIGN PATENTS Number v Country. Date 364,093 ,Germany Nov, 18, 1922 

